He was replaced by Lt Frank Fraser.他被弗兰克·弗雷泽中尉顶替。George Fraser was clearly a good soldier, calm and resilient...乔治·弗雷泽显然是个好士兵，沉着冷静且适应力强。Lord Fraser's speech offers much food for thought...弗雷泽勋爵的讲演发人深省。Fraser did not...
加热室是多晶硅铸锭炉的关键部件之一.Heating chamber is pivotal part of the polycrystalline silicon ingot production furnace.沸腾钢在铸锭前不脱氧或轻度脱氧.In the case of rimming steel, no or some deoxidation is carried out before casting.常规DC铸造7050铝合金铸锭...
抽气泵的排气管应该导向室外空旷处或导向一座通风橱.The pump exhaust should lead to the open air or a fume hood.设计了一套硅片专用真空夹紧装置,包括夹紧装置和微型无油真空抽气泵.A vacuum clamp equipment used for holding Si wafer is designed in this paper....